Shower stall



FIG. 1 is a front perspective view of a shower stall showing my new design;

FIG. 2 is a perspective view taken from the bottom, rear and one side thereof; and

FIG. 3 is a top plan view thereof; and

FIG. 4 is a fragmentary cross sectional view taken on line 4--4 of FIG. 3. 

The ornamental design for a shower stall, substantially as shown. 